I don't think it is extreme at all.
Joe, that is cool that you and your neighbors had an agreement so you guys could have plenty of space to do as you please. Sounds like it works great for you guys :) However in Roos case she has made it clear that she is not a people person. Which I can identify with....when I am at home I want to be left alone. Also where I came from trespassing is a good way to get bullets whizzing past your ears. People take "Private Property, No Trespassing" very serious. What other reason would someone live two hours from town out in the middle of nowhere, if they didn't want to be left alone...LOL It is proper etiquette to ask permission to cross someones property. If the neighbor would of least asked it would of showed an effort on her part to do the right thing...but she didn't. For me, that says something about her character.
Roo said she has no desire to make a riding buddy out of the neighbor. If I didn't want to become buddies with my neighbor I probably wouldn't invite her to ride on my property. No one wants to sit in their house waiting for the neighbor to leave your place so you can ride in peace by yourself..LOL.